Skip Cosmos vector/hybrid search tests on Linux emulator#38261
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The vnext-preview Cosmos Linux emulator Docker image was updated between May 8-11, 2026. It now rejects 'flat' and 'quantizedFlat' vector index types (only 'diskANN' claimed as supported), and rejects 'uint8'/'int8' embedding data types (only 'float32'/'float16'). However, diskANN itself also doesn't work - container creation with diskANN vector indexes returns a 500 InternalServerError with PostgresError(SqlState(E42704)). This is an emulator bug. The fix: - Keep vector embedding config (IsVectorProperty) unconditionally so VectorDistance() translation is still tested - Make all vector index config (IsVectorIndex/HasVectorIndex) conditional on !TestEnvironment.IsLinuxEmulator - Make byte/sbyte embedding config conditional (unsupported data types) - Skip byte/sbyte vector tests with [CosmosCondition(IsNotLinuxEmulator)] - Change index type from Flat to DiskANN for non-emulator environments Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Pull request overview
Adjusts Cosmos vector search functional tests to accommodate breaking/buggy vector index behavior in the current Linux Cosmos emulator image while preserving coverage for VectorDistance() query translation.
Changes:
- Skip byte/sbyte vector-distance tests on the Linux emulator via
CosmosCondition.IsNotLinuxEmulator. - Disable all vector index creation (
IsVectorIndex) whenTestEnvironment.IsLinuxEmulatorto avoid container-creation failures. - Switch vector index type from
FlattoDiskANNfor non-Linux-emulator environments.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| test/EFCore.Cosmos.FunctionalTests/Query/Translations/VectorSearchTranslationsCosmosTest.cs | Skips byte/sbyte vector tests on Linux emulator and conditionally avoids vector index creation while keeping float vector properties for query translation coverage. |
| test/EFCore.Cosmos.FunctionalTests/Query/Translations/HybridSearchTranslationsCosmosTest.cs | Updates vector index type to DiskANN and adds Linux-emulator gating (though this file already has a class-level IsNotEmulator condition). |
The vnext-preview Cosmos Linux emulator doesn't support vector search (neither vector indexes nor byte/sbyte embedding data types), so skip the entire test classes on the Linux emulator. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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| namespace Microsoft.EntityFrameworkCore.Query.Translations; | ||
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| [CosmosCondition(CosmosCondition.DoesNotUseTokenCredential | CosmosCondition.IsNotEmulator)] | ||
| [CosmosCondition(CosmosCondition.DoesNotUseTokenCredential | CosmosCondition.IsNotEmulator | CosmosCondition.IsNotLinuxEmulator)] |
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This already has CosmosCondition.IsNotEmulator, the new condition is redundant
AndriySvyryd
approved these changes
May 12, 2026
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The Linux emulator doesn't currently support vector search: Azure/azure-cosmos-db-emulator-docker#162. I'm not sure what/how exactly was passing before, but this PR disables these until support is properly added.